EP 2935902 A1 20151028 - MULTI-STAGE VACUUM EJECTOR WITH MOULDED NOZZLE HAVING INTEGRAL VALVE ELEMENTS
Title (en)
MULTI-STAGE VACUUM EJECTOR WITH MOULDED NOZZLE HAVING INTEGRAL VALVE ELEMENTS
Title (de)
MEHRSTUFIGER VAKUUMEJEKTOR MIT GEFORMTER DÜSE MIT INTEGRIERTEN VENTILELEMENTEN
Title (fr)
EJECTEUR A VIDE À PLUSIEURS ÉTAGES AVEC D'EMBOUCHURE MOULÉE AYANT ÉLÉMENTS DE SOUPAPE INTÉGRÉS
Publication
Application
Priority
- GB 201223420 A 20121221
- EP 2013077121 W 20131218
Abstract (en)
[origin: GB2509184A] So as to render the manufacturing of an at least equally efficient multi-stage ejector more cost-efficient, the invention provides a multi-stage ejector for generating a vacuum from a source of compressed air by passing said compressed air through a series of nozzles, accelerating said compressed air, and entraining air so as to form a jet flow in one or more stages and generate a vacuum across each stage, the multi-stage ejector comprising a drive stage 200A; a second stage 200B; and a converging-diverging nozzle provided in said series of nozzles between said drive stage and said second stage for receiving jet flow from said drive stage and accelerating said jet flow to form a second stage air jet and directing said second stage air jet into an inlet of an outlet nozzle of the second stage, wherein said converging-diverging nozzle is formed in a moulded nozzle piece mounted in said multi-stage ejector.
IPC 8 full level
CPC (source: EP GB US)
F04F 5/22 (2013.01 - EP GB US); F04F 5/467 (2013.01 - US); F04F 5/54 (2013.01 - EP US)
Citation (search report)
See references of WO 2014096022A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
GB 201223420 D0 20130206; GB 2509184 A 20140625; CN 105264238 A 20160120; CN 105264238 B 20170517; EP 2935902 A1 20151028; EP 2935902 B1 20170215; JP 2016502028 A 20160121; JP 6320415 B2 20180509; US 10767662 B2 20200908; US 2015300377 A1 20151022; WO 2014096022 A1 20140626
DOCDB simple family (application)
GB 201223420 A 20121221; CN 201380060785 A 20131218; EP 13808041 A 20131218; EP 2013077121 W 20131218; JP 2015548485 A 20131218; US 201314648205 A 20131218